Measurement of the properties of Higgs boson production at $\sqrt{s} = 13$ TeV in the $H\to\gamma\gamma$ channel using $139$ fb$^{-1}$ of $pp$ collision data with the ATLAS experiment

The ATLAS collaboration
JHEP 07 (2023) 088, 2023.

Abstract (data abstract)
Measurements of Higgs boson production cross-sections are carried out in the diphoton decay channel using 139 fb$^{-1}$ of $pp$ collision data at $\sqrt{s}$ = 13 TeV collected by the ATLAS experiment. The inclusive Higgs boson signal strength in the diphoton channel is measured to be $1.04^{+0.10}_{-0.09}$. Cross-sections for gluon-gluon fusion, weak vector boson fusion, associated production with a $W$ or $Z$ boson, and top associated production processes are reported. An upper limit of 10 times the Standard Model prediction is set for the associated production process of a Higgs boson with a single top quark. Higgs boson production is further characterized through measurements of Simplified Template Cross-Sections (STXS). In total, cross-sections of 28 STXS regions are measured. The level of compatibility between the measured STXS cross-sections and their Standard Model predictions is $93\%$. The measurements are also used to set constraints on Higgs boson coupling strengths, as well as on new interactions beyond the Standard Model in an effective field theory approach. No significant deviations from the Standard Model predictions are observed in these measurements.

  • Figure 9

    Data from Figure 9

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    Cross-sections times H->yy branching ratio for ggF +bbH, VBF, VH, ttH, and tH production, normalized to their SM predictions. The...

  • Figure 10

    Data from Figure 10

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    Correlation matrix for the measurement of production cross-sections of the Higgs boson times the H->yy branching ratio.

  • Figure 12

    Data from Figure 12

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    Best-fit values and uncertainties for STXS parameters in each of the 28 regions considered, normalized to their SM predictions. The...

  • Figure 13

    Data from Figure 13

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    Correlation matrix for the measurement of STXS parameters in each of the 28 regions considered.

  • Kappa results

    Data from kappa results

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    Fitted values for kappa_g and kappa_y.

  • Kappa correlation results

    Data from kappa correlation results

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    Correlation matrix for the measurement of kappa_g and kappa_y.

  • Figure 17

    Data from Figure 17

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    Summary of the 68% CL confidence intervals for individual measurements of SMEFT parameters observed in data. In each case, SMEFT...

  • Figure 19

    Data from Figure 19

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    Results of the EV parameter measurement in data, in the linear and linear+quadratic parameterizations of the SMEFT. All the EVs...

  • Figure 21 (left)

    Data from Figure 21

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    Observed linear correlation coefficients of the EVs parameters in the linear parameterization.

  • Figure 21 (right)

    Data from Figure 21

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    Observed linear correlation coefficients of the EVs parameters in the linear+quadratic parameterization.

  • Figure 27

    Data from Figure 27

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    Cross-sections times H->yy branching ratio for ggF +bbH, VBF, VH, ttH, and tH production. The values are obtained from a...

  • Figure 28

    Data from Figure 28

    10.17182/hepdata.129799.v1/t12

    Best-fit values and uncertainties for STXS parameters in each of the 28 regions considered. The values for the gg->H process...

  • Figure 29

    Data from Figure 29

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    Correlation matrix for the measurement of STXS parameters in each of the 33 regions considered.

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